1 /*

     2  * Copyright 2010 Sun Microsystems, Inc.  All Rights Reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  */

    23 

    24 

    25 public class Util {

    26 

    27     private Util() { }

    28 

    29     // Returns -1 if equal, o.w. returns index of first difference

    30     //

    31     public static int cmp(byte[] ba, byte[] bb) {

    32         int n = Math.min(ba.length, bb.length);

    33         for (int i = 0; i < n; i++) {

    34             if ((i >= ba.length) || (i >= bb.length))

    35                 return i;

    36             if (ba[i] != bb[i])

    37                 return i;

    38         }

    39         if (ba.length != bb.length)

    40             return 0;

    41         return -1;

    42     }

    43 

    44     // Returns -1 if equal, o.w. returns index of first difference

    45     //

    46     public static int cmp(char[] ca, char[] cb) {

    47         int n = Math.min(ca.length, cb.length);

    48         for (int i = 0; i < n; i++) {

    49             if ((i >= ca.length) || (i >= cb.length))

    50                 return i;

    51             if (ca[i] != cb[i])

    52                 return i;

    53         }

    54         if (ca.length != cb.length)

    55             return 0;

    56         return -1;

    57     }

    58 

    59     public static String toString(byte[] ba, int off, int len) {

    60         StringBuffer sb = new StringBuffer();

    61         for (int i = off; i < off + len; i++) {

    62             int c = ba[i];

    63             if (c == '\\') {

    64                 sb.append("\\\\");

    65                 continue;

    66             }

    67             if ((c >= ' ') && (c < 0x7f)) {

    68                 sb.append((char)c);

    69                 continue;

    70             }

    71             sb.append("\\x");

    72             sb.append(Integer.toHexString(c & 0xff));

    73         }

    74         return sb.toString();

    75     }

    76 

    77     public static String toString(byte[] ba) {

    78         return toString(ba, 0, ba.length);

    79     }

    80 

    81     public static String toString(char[] ca, int off, int len) {

    82         StringBuffer sb = new StringBuffer();

    83         for (int i = off; i < off + len; i++) {

    84             char c = ca[i];

    85             if (c == '\\') {

    86                 sb.append("\\\\");

    87                 continue;

    88             }

    89             if ((c >= ' ') && (c < 0x7f)) {

    90                 sb.append(c);

    91                 continue;

    92             }

    93             sb.append("\\u");

    94             String s = Integer.toHexString(c);

    95             while (s.length() < 4)

    96                 s = "0" + s;

    97             sb.append(s);

    98         }

    99         return sb.toString();

   100     }

   101 

   102     public static String toString(char[] ca) {

   103         return toString(ca, 0, ca.length);

   104     }

   105 

   106     public static String toString(String s) {

   107         return toString(s.toCharArray());

   108     }

   109 

   110     public static String toString(char c) {

   111         return toString(new char[]{ c });

   112     }

   113 

   114 }